Do not touch module with #![rustfmt::skip]

Author: topecongiro

src/formatting.rs

@@ -2,7 +2,7 @@
 
 use std::time::{Duration, Instant};
 
-use rustc_ast::ast;
+use rustc_ast::{ast, attr::HasAttrs};
 use rustc_span::symbol;
 
 pub(crate) use syntux::session::ParseSess;
@@ -14,7 +14,7 @@ use crate::formatting::{
     newline_style::apply_newline_style,
     report::NonFormattedRange,
     syntux::parser::{DirectoryOwnership, Parser, ParserError},
-    utils::count_newlines,
+    utils::{contains_skip, count_newlines},
     visitor::FmtVisitor,
 };
 use crate::{
@@ -129,6 +129,10 @@ fn format_project(
         if (!operation_setting.recursive && path != &main_file) || should_ignore {
             continue;
         }
+        if contains_skip(module.attrs()) {
+            continue;
+        }
+
         should_emit_verbose(input_is_stdin, operation_setting.verbosity, || {
             println!("Formatting {}", path)
         });

src/formatting/visitor.rs

@@ -959,12 +959,14 @@ impl<'b, 'a: 'b> FmtVisitor<'a> {
 
     pub(crate) fn format_separate_mod(&mut self, m: &Module<'_>, end_pos: BytePos) {
         self.block_indent = Indent::empty();
-        if self.visit_attrs(m.attrs(), ast::AttrStyle::Inner) {
-            self.push_skipped_with_span(m.attrs(), m.as_ref().inner, m.as_ref().inner);
-        } else {
-            self.walk_mod_items(m.as_ref());
-            self.format_missing_with_indent(end_pos);
-        }
+        let skipped = self.visit_attrs(m.attrs(), ast::AttrStyle::Inner);
+        assert!(
+            !skipped,
+            "Skipping module must be handled before reaching this line.",
+        );
+
+        self.walk_mod_items(m.as_ref());
+        self.format_missing_with_indent(end_pos);
     }
 
     pub(crate) fn skip_empty_lines(&mut self, end_pos: BytePos) {